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ASUS P5ND2-SLI SeriesASUS P5ND2-SLI Series

ASUS P5ND2-SLI Series

5-215-21

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5.4 RAID configurations

The motherboard comes with the Silicon Image Sil3132 and the NVIDIA

nForce™ 4 SLI Southbridge RAID controllers that allow you to configure IDE

and Serial ATA hard disk drives as RAID sets. The motherboard supports

the following RAID configurations.

RAID 0RAID 0

RAID 0

(Data striping)

optimizes two identical hard disk drives to read and

write data in parallel, interleaved stacks. Two hard disks perform the same

work as a single drive but at a sustained data transfer rate, double that of

a single disk alone, thus improving data access and storage. Use of two

new identical hard disk drives is required for this setup.

RAID 1RAID 1

RAID 1

(Data mirroring)

copies and maintains an identical image of data

from one drive to a second drive. If one drive fails, the disk array

management software directs all applications to the surviving drive as it

contains a complete copy of the data in the other drive. This RAID

configuration provides data protection and increases fault tolerance to the

entire system. Use two new drives or use an existing drive and a new drive

for this setup. The new drive must be of the same size or larger than the

existing drive.

RAID 0+1RAID 0+1

RAID 0+1 is

data striping

and

data mirroring

combined without parity

(redundancy data) having to be calculated and written. With the RAID 0+1

configuration you get all the benefits of both RAID 0 and RAID 1

configurations. Use four new hard disk drives or use an existing drive and

three new drives for this setup.

RAID 5RAID 5

RAID 5 stripes both data and parity information across three or more hard

disk drives. Among the advantages of RAID 5 configuration include better

HDD performance, fault tolerance, and higher storage capacity. The RAID 5

configuration is best suited for transaction processing, relational database

applications, enterprise resource planning, and other business systems.

Use a minimum of three identical hard disk drives for this setup.

RAID 10RAID 10

RAID 10 is a striped configuration with each stripe a RAID 1 array of

drives. It combines the features of both RAID 1 and RAID 0. Fault tolerance

is provided through

mirroring

while adding performance through

striping

This offers higher performance than a RAID 1 configuration but at a much

higher cost. A minimum of four hard disk drives is required for this setup.

JBODJBOD

JBOD

(Spanning)

stands for

Just a Bunch of DisksJust a Bunch of Disks

Just a Bunch of Disks and refers to hard

disk drives that are not yet configured as a RAID set. This configuration

stores the same data redundantly on multiple disks that appear as a single

disk on the operating system. Spanning does not deliver any advantage

over using separate disks independently and does not provide fault

tolerance or other RAID performance benefits.